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Converging Lenses and Magnification

  1. Mar 31, 2010 #1
    I'm in the middle of studying for the MCAT, and just want to get all the concepts instead of memorizing how to solve problems. I'm having a hard time understanding converging lenses.

    From what I understand, converging lenses create real images that are inverted. This property of inversion means that the magnification should be negative, where m = - (i / o). Since the image (i) is a positive number (real) and the object is a negative number (other side of lens), how is it possible that m is negative? i.e. - (positive/negative) = positive

    What am I missing here?

    My appreciation in advance!
    Last edited: Mar 31, 2010
  2. jcsd
  3. Mar 31, 2010 #2

    Doc Al

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    Staff: Mentor

    The usual sign convention (there are several) treats object distances as positive if the object is in front of the lens (as usual).
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